在SQL 2008中将列值转换为行

Question

如果您可以帮助我将Column转换为SQL Table中的行，那就太好了。

假设我有3列，分别是：

• 员工ID
• Shift_Date
• Shift_ID

目前它像这样出现：

像这样的桌子

我想像这样显示为结果- 结果表

但是我想要有价值的东西，请您帮忙。 谢谢。

这是我写的查询，但仍然出错：

DECLARE @cols AS NVARCHAR(MAX),
        @query  AS NVARCHAR(MAX)

select @cols = STUFF((SELECT distinct ',' + QUOTENAME(shift_date) 
                    from dbo.tbl_Multi_Shift_Employee WHERE Shift_Date BETWEEN CONVERT(DATE, '01/02/2018 00:00:00',103) AND CONVERT(DATE, '28/02/2018 00:00:00',103)
            FOR XML PATH(''), TYPE
            ).value('.', 'NVARCHAR(MAX)') 
        ,1,1,'')

set @query = 'SELECT Employee_ID, total, Department_ID, shift_id, ' + @cols + ' from 
             (
                select count(*) over(partition by t.Employee_ID) total,
                  s.Department_ID,
                  t.Employee_ID,
                  t.shift_id
                from dbo.tbl_Multi_Shift_Employee t
                inner join dbo.tbl_department s
                  on t.Department_ID = s.Department_ID
            ) x
            pivot 
            (
                count(shift_id)
                for shift_id in (' + @cols + ')
            ) p '
PRINT @query
execute(@query)

Answer 1

首先，您必须从主选择中删除shift_id，因为它用作数据透视。 其次，将shift_id更改为shift_date，这是您用作透视列的正确列。

DECLARE @cols AS NVARCHAR(MAX),
    @query  AS NVARCHAR(MAX)

select @cols = STUFF((SELECT distinct ',' + QUOTENAME(shift_date) 
                from dbo.tbl_Multi_Shift_Employee WHERE Shift_Date BETWEEN CONVERT(DATE, '01/02/2018 00:00:00',103) AND CONVERT(DATE, '28/02/2018 00:00:00',103)
        FOR XML PATH(''), TYPE
        ).value('.', 'NVARCHAR(MAX)') 
    ,1,1,'')

set @query = 'SELECT Employee_ID, total, Department_ID, ' + @cols + ' from 
         (
            select count(*) over(partition by t.Employee_ID) total,
              s.Department_ID,
              t.Employee_ID,
              t.shift_id,
                t.shift_date
            from dbo.tbl_Multi_Shift_Employee t
            inner join dbo.tbl_department s
              on t.Department_ID = s.Department_ID
        ) x
        pivot 
        (
            count(shift_id)
            for shift_date in (' + @cols + ')
        ) p '
PRINT @query
execute(@query)